| タイトル | Excitation of an electrostatic wave by a cold electron current sheet of finite thickness |
| 著者（英） | Hwang, K. S.; Ong, R. S. B.; Fontheim, E. G. |
| 著者所属（英） | Michigan Univ. |
| 発行日 | 1983-03-01 |
| 言語 | eng |
| 内容記述 | Calculations for the threshold of current-driven instabilities and the growth rates of ion acoustic and electrostatic ion cyclotron instabilities in a magnetized plasma driven a current sheet with a finite width are presented. Maxwellian equations are employed to model the velocity distributions of electrons and ions in a direction perpendicular to the sheet. A dispersion relation is defined for the regions of instability, and boundary conditions are characterized in order to obtain a set of eigenvalue equations. Thresholds are delineated for various regions, including ducted mode solutions where only ion-acoustic waves are excited in areas where the frequency range significantly exceeds the ion cyclotron frequency. When a constant electron drift velocity is present, a thick current sheet is more unstable than a thin one. Fewer modes become unstable with a thinner sheet. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 83A31530 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/404333 |
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